From owner-svn-src-head@freebsd.org Sun Oct 13 15:40:35 2019 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B1D17131BEA; Sun, 13 Oct 2019 15:40:35 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46rm9b23dCz4C5T; Sun, 13 Oct 2019 15:40:35 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 27BAE1EF09; Sun, 13 Oct 2019 15:40:35 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x9DFeZ39052970; Sun, 13 Oct 2019 15:40:35 GMT (envelope-from mjg@FreeBSD.org) Received: (from mjg@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x9DFeYmf052968; Sun, 13 Oct 2019 15:40:34 GMT (envelope-from mjg@FreeBSD.org) Message-Id: <201910131540.x9DFeYmf052968@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mjg set sender to mjg@FreeBSD.org using -f From: Mateusz Guzik Date: Sun, 13 Oct 2019 15:40:34 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r353469 - in head/sys: kern sys X-SVN-Group: head X-SVN-Commit-Author: mjg X-SVN-Commit-Paths: in head/sys: kern sys X-SVN-Commit-Revision: 353469 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 Oct 2019 15:40:35 -0000 Author: mjg Date: Sun Oct 13 15:40:34 2019 New Revision: 353469 URL: https://svnweb.freebsd.org/changeset/base/353469 Log: vfs: add MNTK_NOMSYNC On many filesystems the traversal is effectively a no-op. Add a way to avoid the overhead. Reviewed by: kib Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D22009 Modified: head/sys/kern/vfs_subr.c head/sys/sys/mount.h Modified: head/sys/kern/vfs_subr.c ============================================================================== --- head/sys/kern/vfs_subr.c Sun Oct 13 15:39:11 2019 (r353468) +++ head/sys/kern/vfs_subr.c Sun Oct 13 15:40:34 2019 (r353469) @@ -4395,6 +4395,9 @@ vfs_msync(struct mount *mp, int flags) CTR2(KTR_VFS, "%s: mp %p", __func__, mp); + if ((mp->mnt_kern_flag & MNTK_NOMSYNC) != 0) + return; + MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) { obj = vp->v_object; if (obj != NULL && (obj->flags & OBJ_MIGHTBEDIRTY) != 0 && Modified: head/sys/sys/mount.h ============================================================================== --- head/sys/sys/mount.h Sun Oct 13 15:39:11 2019 (r353468) +++ head/sys/sys/mount.h Sun Oct 13 15:40:34 2019 (r353469) @@ -396,6 +396,7 @@ void __mnt_vnode_markerfree_active(struct vno #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ #define MNTK_ASYNC 0x00000002 /* filtered async flag */ #define MNTK_SOFTDEP 0x00000004 /* async disabled by softdep */ +#define MNTK_NOMSYNC 0x00000008 /* don't do vfs_msync */ #define MNTK_DRAINING 0x00000010 /* lock draining is happening */ #define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */ #define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */